The Catholic Encyclopedia.
The site includes biographical information on Gower, as well as his religious affiliations with the church: “he lived in the priory of St. Mary Overy (now St. Saviour), Southwark, to which he was a generous benefactor.” He was buried in the chapel of St. John the Baptist. Although Glower criticized the vices of clergy of every rank, he dissociated himself from contemporary dissenters, such as the Lollards.

Religious Conflict in Fourteenth-Century-Century England
This web page, part of the On-line Reference Book for Medieval Studies (ORB), offers some insight into the connections between political and economic changes, and the changes in religious thought in England during Glower’s lifetime. The article discusses doctrinal conflicts generally within the church and ends with a discussion of John Wyclif, the heretical philosopher, theologian, and priest whose followers (the Lollards) translated the bible into English.

Florilegium urbanum – “Religion, piety, and charity – introductory essay.”
This web page contains a comprehensive view of religious life in English urban society. The page includes accompanying images and provides a sense of the church’s role and activities during Gower’s lifetime.

MEDIEVAL-RELIGION Archives - “Scholarly discussions of medieval religious culture”
An archive of conversations (primarily among scholars and academics) of medieval religious topics. The discussions cover a considerable array of topics; the entries are intelligent and stimulating. There is also a search function that allows you to search the archives for a specific topic.